function s1_goto_dir (){
  cd $1 
}

function s2_touch_empty_file_with_given_name(){
    touch $1
}

function s3_make_directories(){
         mkdir projects
         mkdir projects/git
         mkdir projects/backup
}

function s4_create_6_files(){
   touch projects/linux{1_centos,2_centos,1_redhat,2_redhat,1_c_programming,2_c_programming}        
}

function s5_make_directories_in_git(){
     mkdir projects/git/linux1
     mkdir projects/git/linux2
}

function s6_move_files_to_dir_1_or_2(){
       mv projects/linux1_* projects/git/linux1
       mv projects/linux2_* projects/git/linux2            
}

function s7_create_package_and_compress(){
    tar -czvf projects/backup/git.tar.gz projects/git
}

function s8_delete_dir_git(){
      rm projects/git
}

function s9_recover_from_git_tar_gz_backup(){
     tar -zxvf projects/backup/git.tar.gz projects
}

function s10_create_package_and_compress(){
       tar -jcvf projects/backup/git.tar.bz2 projects/git
}

function s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
         find projects |sort
}

function s12_get_next_15_minutes_boundary(){
      date+"%Y-%m-%d %H:%M:%S" --date="+15minute" 
}

